Scientists have demonstrated the gene-editing process, but no photos of the gene-edited babies have been released

What is gene editing?

Here's what you need to know...

Gene editing involves inserting, deleting, modifying or replacing the DNA of a living organism

It could help protect humans against diseases and natural illness

And some believe that gene editing could give us superhuman enhancements

These could include boosted sense of smell or improved night vision

Scientists are divided over the ethics of gene editing

Editing DNA is a new and risky science that could have unknown consequences for babies

And DNA-editing could lead to societal changes, with the prospect of "designer babies" becoming real

This could lead to severe inequality – a future where only the rich can afford to modify their DNA could lead to a new elite race of superhumans

Gene editing has been successfully performed on mice embryos

And one Chinese scientists claims to have successfully gene-edited the embryos of two human baby girls

Chinese scientists were also responsible for creating the world's first gene-edited mice earlier this year.

The mice were able to live to adulthood, and even have offspring of their own.

It's illegal to create genetically-altered babies in the UK.

But earlier this year, the Nuffield Council of Bioethics said that changing a human embryo's DNA could be "morally permissible".

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In a report, leading science ethicists suggested that it would need to be in the child's interests, and that it didn't work to deepen societal inequalities.

"It is our view that genome editing is not morally unacceptable in itself,” said Karen Yeung, a professor of law and ethics at the University of Birmingham, who chairs the Nuffield working group. There is no reason to rule it out in principle."

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